Android中日期和时间控件的使用

            本文主要讲述Android中的日期控件和时间控件的使用，以一个Demo的例子来展示日期和时间控件的使用，先看下如下效果图：

从效果图中可以看到该Demo是通过单击【选择日期】按钮和【选择时间】按钮弹出日期或者时间的对话框，然后设置日期或者时间，设置完成后会在文本框中显示设置的日期或时间值。

【1】Demo程序框架图：

【2】布局文件 res/layout/main.xml 源码：

<?xml version="1.0" encoding="utf-8"?>  <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"      android:orientation="vertical"      android:layout_width="fill_parent"      android:layout_height="fill_parent">      <TextView          android:layout_width="fill_parent" android:layout_height="wrap_content"          android:gravity="center" android:text="欢迎关注Andy.Chen Blog" />       <TextView          android:layout_width="fill_parent" android:layout_height="wrap_content"          android:gravity="center" android:text="日期和时间控件的使用DEMO" />            <LinearLayout android:orientation="horizontal"           android:layout_width="fill_parent" android:layout_height="wrap_content">             <EditText android:id="@+id/showdate" android:layout_width="fill_parent"               android:layout_height="wrap_content" android:layout_weight="1"/>           <Button android:id="@+id/pickdate" android:layout_width="wrap_content"               android:layout_height="wrap_content" android:text="选择日期"/>            </LinearLayout>             <LinearLayout android:orientation="horizontal"           android:layout_width="fill_parent" android:layout_height="wrap_content">             <EditText android:id="@+id/showtime" android:layout_width="fill_parent"               android:layout_height="wrap_content" android:layout_weight="1"/>           <Button android:id="@+id/picktime" android:layout_width="wrap_content"               android:layout_height="wrap_content" android:text="选择时间"/>            </LinearLayout>   </LinearLayout>

package com.andyidea.calenderdemo;    import java.util.Calendar;    import android.app.Activity;  import android.app.DatePickerDialog;  import android.app.Dialog;  import android.app.TimePickerDialog;  import android.os.Bundle;  import android.os.Handler;  import android.os.Message;  import android.view.View;  import android.widget.Button;  import android.widget.DatePicker;  import android.widget.EditText;  import android.widget.TimePicker;    public class MainActivity extends Activity {      private EditText showDate = null;   private Button pickDate = null;   private EditText showTime = null;   private Button pickTime = null;      private static final int SHOW_DATAPICK = 0;       private static final int DATE_DIALOG_ID = 1;        private static final int SHOW_TIMEPICK = 2;      private static final int TIME_DIALOG_ID = 3;            private int mYear;        private int mMonth;      private int mDay;       private int mHour;      private int mMinute;         /** Called when the activity is first created. */      @Override      public void onCreate(Bundle savedInstanceState) {          super.onCreate(savedInstanceState);          setContentView(R.layout.main);                    initializeViews();                    final Calendar c = Calendar.getInstance();          mYear = c.get(Calendar.YEAR);            mMonth = c.get(Calendar.MONTH);            mDay = c.get(Calendar.DAY_OF_MONTH);                    mHour = c.get(Calendar.HOUR_OF_DAY);          mMinute = c.get(Calendar.MINUTE);                    setDateTime();           setTimeOfDay();      }            /**       * 初始化控件和UI视图       */      private void initializeViews(){          showDate = (EditText) findViewById(R.id.showdate);            pickDate = (Button) findViewById(R.id.pickdate);           showTime = (EditText)findViewById(R.id.showtime);          pickTime = (Button)findViewById(R.id.picktime);                    pickDate.setOnClickListener(new View.OnClickListener() {          @Override     public void onClick(View v) {              Message msg = new Message();               if (pickDate.equals((Button) v)) {                   msg.what = MainActivity.SHOW_DATAPICK;                }                MainActivity.this.dateandtimeHandler.sendMessage(msg);      }    });                    pickTime.setOnClickListener(new View.OnClickListener() {          @Override     public void onClick(View v) {              Message msg = new Message();               if (pickTime.equals((Button) v)) {                   msg.what = MainActivity.SHOW_TIMEPICK;                }                MainActivity.this.dateandtimeHandler.sendMessage(msg);      }    });      }        /**       * 设置日期       */   private void setDateTime(){         final Calendar c = Calendar.getInstance();                    mYear = c.get(Calendar.YEAR);           mMonth = c.get(Calendar.MONTH);           mDay = c.get(Calendar.DAY_OF_MONTH);              updateDateDisplay();    }      /**    * 更新日期显示    */   private void updateDateDisplay(){         showDate.setText(new StringBuilder().append(mYear).append("-")           .append((mMonth + 1) < 10 ? "0" + (mMonth + 1) : (mMonth + 1)).append("-")                 .append((mDay < 10) ? "0" + mDay : mDay));    }         /**        * 日期控件的事件        */        private DatePickerDialog.OnDateSetListener mDateSetListener = new DatePickerDialog.OnDateSetListener() {               public void onDateSet(DatePicker view, int year, int monthOfYear,                  int dayOfMonth) {               mYear = year;               mMonth = monthOfYear;               mDay = dayOfMonth;                 updateDateDisplay();         }        };       /**    * 设置时间    */   private void setTimeOfDay(){      final Calendar c = Calendar.getInstance();          mHour = c.get(Calendar.HOUR_OF_DAY);         mMinute = c.get(Calendar.MINUTE);         updateTimeDisplay();   }      /**    * 更新时间显示    */   private void updateTimeDisplay(){         showTime.setText(new StringBuilder().append(mHour).append(":")                 .append((mMinute < 10) ? "0" + mMinute : mMinute));    }            /**       * 时间控件事件       */      private TimePickerDialog.OnTimeSetListener mTimeSetListener = new TimePickerDialog.OnTimeSetListener() {        @Override    public void onTimeSet(TimePicker view, int hourOfDay, int minute) {     mHour = hourOfDay;     mMinute = minute;          updateTimeDisplay();    }   };            @Override        protected Dialog onCreateDialog(int id) {           switch (id) {           case DATE_DIALOG_ID:               return new DatePickerDialog(this, mDateSetListener, mYear, mMonth,                      mDay);         case TIME_DIALOG_ID:          return new TimePickerDialog(this, mTimeSetListener, mHour, mMinute, true);         }                   return null;        }            @Override        protected void onPrepareDialog(int id, Dialog dialog) {           switch (id) {           case DATE_DIALOG_ID:               ((DatePickerDialog) dialog).updateDate(mYear, mMonth, mDay);               break;         case TIME_DIALOG_ID:          ((TimePickerDialog) dialog).updateTime(mHour, mMinute);          break;         }      }            /**        * 处理日期和时间控件的Handler        */        Handler dateandtimeHandler = new Handler() {             @Override           public void handleMessage(Message msg) {               switch (msg.what) {               case MainActivity.SHOW_DATAPICK:                   showDialog(DATE_DIALOG_ID);                   break;              case MainActivity.SHOW_TIMEPICK:              showDialog(TIME_DIALOG_ID);              break;             }           }            };         }

【4】程序运行效果图：